Valve reseating tool



Oct. 23, 1934. J. TEKAVEC VALVE RESEATING TOOL Filed Dec. 7. 1932 2 Sheets-Sheet 1 6///////// A// v7 A ///7/////////fi/ INVENTOR. T e k a. veG

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J. TEKAVEC VALVE RESEA'I I NG TOOL Filed Dec. 7. 1952 Patented Oct. 23, 1934 UNITED; STATES PATENT OFFICE 1 81 VALVE- REsEA'riNc. TOOL John Tek avecl Cleveland, Ohio Application December 7, 1932, Serial No. 646,137

' 4Claims. (01.90 125;

The invention relates to improvements in valve reseaters and has for its objects the provision of means to increase their efficiency, especially the feeding mechanism.

It is an object of the invention to construct and organize a valve reseater, simple in construction, readily manufactured, and readily assembled or taken apart for repairs.

The component parts of the valve reseater are simple in form, few in number, and may be manufactured at low cost by modern methods, most of the work being done on automatic machines, by which great economy in manufacture may be attained.

Referring to the accompanying drawings, made a part hereof, and on which similar reference characters indicate similar parts, it is obvious that the form, proportions, and other details of the various parts of the valve reseater may be modified in many ways to suit various requirements or different conditions of service.

Figure 1 is a central transverse section of one form of a valve reseater. I

Figure 2 is a front elevation of Figure 1.

Figure 3 is a front elevation of another form of valve reseater, parts shown in vertical-section, and showing an externally tapered threaded conical attaching instrumentality thereon.

Figure 4 is an end view of a clamping member.

Figure 5 is a side view of the same.

Figure 6 is a front elevation of a housing means with the feeding means removed therefrom.

Figure 7 is a cross section on line A-A in Figure 2, and showing the locking means and its relation to the tool shaft.

Figure 8 is a sectional view on Figure 6.

Figure 9 is a front elevation of the member that carries the feeding means shown in Figure 1.

Figure 10 is a central transverse section of an? other form of a valvereseater, and showing another type of a feeding means. I

Figure 11 is a front elevation showing the feeding means shown in Figure 10, and showing in section another method of attaching the attaching instrumentality to the feeding means.

Figure 12 is a front view of the form shown in Figure 10, and showing another form of attaching instrumentality attached thereto.

Referring to the several figures of the drawings, the valve reseater comprises an attaching instrumentality or means of suitable truncated conical, or cylindrical configuration, either in- .teriorly or exteriorly threaded as at .A, B, C and D. Secured rotatively in relation to, in or on the line 13- 13 in attaching instrumentality is a feed carrying and housing element or means 1, having a reduced elongated tubular projecting portion or securing means 2 or as at 2' or 2" extending from the bottom 3 thereof, the end 4 of the tubular projecting portion may be threaded for the reception of a nut or other suitable holding means 5', provided to secure the feed carrying and housing element in operative relationship with the attaching instrumentality. In the wall 6 of the feed carrying and housing element or means, an elongated slot 7 is provided, hereinafter described.

The feed carrying and housing means may be provided with an interiorly threaded socket 8, to receive, the externally threaded portion 9 of the feeding mechanism or feed screw means 10, which is provided with a smooth longitudinal bore 11 adapted to receive the tool shaft holding means. The feeding mechanism or feed screwisprovided at its upper end with a flange 12 the p'eriphery 13 of which is milled to provide a means whereby the feeding device may be operated easily. v

The tool shaft holding means 14 comprises a sleeve portion 15, having a flange 16 on its lower end provided with a bore'17, which may be nonaxial, for the reception of a tool shaft locking means or a set screw. The upper end 18 may be provided with a thread for the reception of a nut.19, adapted to hold the tool shaft holding means in cooperative relationship in the feeding means. The feeding means is mounted on the sleeve portion 15 of the tool shaft holding means, and is held in operative relationship thereon between the flange 16 on its lower end, and the nut 19 on its upper end. The tool shaft holding means is provided with a longitudinal bore 20 angular or otherwise in cross-section, for the reception of the tool shaft or spindle.

The tool shaft locking device or set screw comprises a member 21, provided with a concave notch 22, and a threaded portion 23 for the reception of the nut lock 24. The radius of the concave notch 22 is slightly greater than the radius of the tool stem. The slight difference in the concave notch allows the tool shaft holding device to slide slightly in the bore, so that when the lock nut 2a is tightened upon the member 21,

the locking device frictionally engages a portion of the periphery of the tool stem or spindle and definitely locks the tool shaft in the holding device.

Surrounding the tool shaft or spindle is the tool shaft holding. means, on this is provided the feeding means, and both of these units are then arranged inside the feed carrying and housing element.

The tool shaft lock or set screw 21 extends through the elongated slot 7 in the wall of the feed carrying and housing means and prevents rotational movement of the tool shaft holding means therein, when the feeding mechanism or feed screw means is manoeuvred in the feeding operation. The elongated slot provides a means for limiting the travel of the feeding screw in advancing and/or withdrawing the end mill in re spect to its cutting relation with a valve or faucet seat, and also holds the feeding mechanismcapi-i tive in the feed carrying and housing element. ,1 The set screw or tool shaft locking means has three distinct functions, namely, first, as a tool shaft locking means; second, as a travel limiting means for the feeding mechanism or feed screw, and holding the same captive in the feed carrying and housing means, and third as an engaging member adapted to engage with the feed carrying and housing element and cooperating therewith in such a manner that when operatively connected with the tool shaft or spindle, a means is provided whereby the feed carrying and housing means may be rotated with the tool shaft when rotation is imparted to it in operation.

The form shown in Figures 10, 11 and 12 distinguishes itself from the above manner of operation in that the socket 25 in the feed carrying and housing element or means 26 is free from the screw-thread and there is mounted slidably therein a cylindrical plug as a tool shaft holding means 2'7, having a reduced tubular portion 28 thereon which forms with the tool shaft holding means a shoulder 29. The upper end. of the tubular portion is "threadedfor the reception of a nut 30. Adjacent the lower end of the plug there is provided a threaded. bore 31 for the reception of a set screw or tool shaft locking means 32 adapted to lock the tool shaft in the tool shaft holding means. The set screw or locking means passes through the aperture 33 in the feed carrying and housing element, and will perform the functions above outlined as to holding the tool shaft in position; as to limiting the longitudinal travel of the cylindrical tool holding means in the socket; and preventing rotation of same therein, and finally as a means to engage with the feed carrying and housing element, thereby providing a means whereby the same may be rotated when rotation is applied to the tool stem when locked in the cylindrical plug or tool shaft holding means.

The upper and outer periphery 34 of the feed carrying and housing element or means is fitly and partly threaded. A feed cap or feeding means 35 having an interiorly threaded portion 36 receives the threaded portion of the feed carrying and housing member.

The feed cap or feeding means is mounted on the reduced tubular portion of the cylindrical member or plug and is secured thereon by a nut 30. Otherwise the construction and operation is the same as outlined for Figures 1 and 2.

In Figure 11 there is shown a method or means whereby the attaching instrumentality or means, and the feed carrying and housing element may be removably secured to, and with each other. An interiorly threaded bushing 37 is mounted freely on the tubular portion 2" of the feed carrying and housing element. and is secured thereto by'a nut 5. The conical or other suitably shaped attaching means is provided with an exteriorly threaded portion 38 adapted to receive the threaded bushing mounted on the feed carrying and housing element. When the above outlined method is used a large variety of attaching instrumentalities may be used with feed carrying and housing means.

The tool shaft 39 is provided with a handle 40 on its upper end, and a removably mounted end mill 41 on its lower end.

The operation of the apparatus is as follows:

The attaching instrumentality is mounted on the dismantled faucet or valve in need of reseating. The feeding means is screwed up until the lsetscrew or tool shaft locking means in the tool shaft holding means engages with the top of the elongated slot in the feed carrying and housing means or element. The tool shaft with its end mill thereon, is now adjusted so that the end mill is brought into milling or cutting relation with the valve or faucet seat. The tool shaft is then looked in the device by means of the set screw or locking means. The tool shaft may now be rotated to remove metal from the seat. The feeding mechanism makes possible a micrometer adjustment whereby one'or two thousandths of an inch may be removed from the seat. This is made possible by simply giving the feeding mechanism or feed screw a slight downward turn. The seat may be thus recut or a new seat formed with accuracy and dispatch.

It will be noted that the tool shaft holding means can move axially, but the locking means or set screw prevents it from moving rotationally in relation to the feed carrying and housing element, other than at the will of the operator.

' It is obvious that the invention is capable of a variety of modifications and various changes to suit the convenience of the user and the exigencies of the particular adaption of the invention, and without deviating from the spirit and scope of the invention as set forth in the claims hereunto annexed when broadly construed. Among the various other uses and applications of the invention I mentionits utilization for completely cutting out the valve seat, reaming and threading the opening preliminary to the installation of a completely new seat.

What I do claim and desire to obtain by Letters Patent of the United States of America is:--

l. A device of the class described, comprising, in combination, a threaded attaching instrumentality of truncated conical configuration, a rotatably mounted slotted, partly and fitly threaded feed carrying and housing element operatively connected to the attaching instrumentality, a tool shaft holding device non-rotatably but slidably mounted co-axially in the feed carrying and housing element, and having a non-axial bore adjacent an end thereof, a tool shaft locking device mounted in the non-axial bore and extending through the slot in the feed carrying and housing element, the tool shaft holding device having a shoulder formed thereon for the reception of a feeding means, a feeding means mounted on the tool shaft holding device and secured thereon between the shoulder formed on the said device and a nut, and also having a threaded portion to coact with the partly and fitly threaded portion of the feed carrying and housing means, and a tool shaft having a hand wheel on its upper end and a detachably mounted end mill on its lower end.

2. A device of the class described, comprising, in combination," a threaded, socketed feed carrying and. housing element having an elongated slot in the Wall thereof and an integral projecting portion therewith, a threaded conical attaching instrumentality rotatably mounted on the projecting portion, a nut mounted on the projecting portion, a nonrotatable tool shaft holding device mounted in the feed carrying and housing element and being longitudinally bored and also having a threaded bore at, right angles to the longitudinal bore therein, a tool shaft mounted in the tool shaft holding device, a tool shaft locking set screw mounted in said threaded bore and passing through the elongated slot in the feed carrying and housing element and interlocking the tool shaft in position in the tool shaft holding device, an operable threaded feeding member mounted in the feed carrying and housing element and controlling the movement and position of the tool shaft holding device, an actuator on the upper end of the tool shaft and a removably mounted end mill on the other end of the tool shaft.

3. A device of the class described, comprising, in combination, a threaded conical attaching instrumentality, a feed carrying and housing means having an elongated slot in the wall thereof, and also having an internally threaded portion, mounted on the attaching instrumentality for rotation about a vertical axis, a tool shaft holding device slidably mounted in said feed carrying and housing means, the tool shaft holding device having an externally threaded feed screw surrounding it and concentric therewith and arranged to cooperate with the internally threaded portion in the feed carrying and housing means,

the tool shaft holding device further having a threaded bore adjacent its lower end for the reception of a set screw, a set screw, the set screw being threaded into the threaded bore in the tool shaft holding device and adapted to hold a tool shaft in locked position in the tool shaft holding device, the set screw mounted in the elongated slot in the feed carrying and housing means and extending laterally from the slot and constraining the tool shaft holding device to move axially slidably in the feed carrying and housing means. and a tool shaft mounted in the device having an actuator on its upper end, and an end mill on its lower end removably connected thereto.

4. A device of the class described, comprising, in combination, a threaded conical attaching instrumentality, a feed carrying and housing element rotatably mounted therein and having an elongated non-axial slot in the wall thereof, and a fitly interiorly threaded portion thereon, a tool shaft holding device having a non-axial bore in a flange formed integral therewith and at an end thereof mounted interiorly in the feed carrying and housing element, a tool shaft in the tool shaft holding device, a feeding means on the tool shaft holding device and positioned in the feed carrying and housing element, the elongated nonaxial slot in the wall of the feed carrying and housing element and the non-axial bore in the tool shaft holding device being in alignment, a tool shaft locking device mounted non rotatably but slightly slidable in the non-axial bore of the flange in the tool shaft holding device and passing through the non-axial slot in the wall of the feed carrying and housing element and providing means whereby the feed carrying and housing element with its contents may be rotated with respect to the attaching instrumentality when the tool shaft locking device is locked upon the tool shaft, the said tool shaft locking means also limiting the travel of the feeding means, and also holding the same captive in the feed carrying and housing element, the tool shaft being provided with an actuating means and a detachable cutter.

JOHN TEKAVEC. 

